基于CAM/CNC集成的航空大型薄壁件数控加工在机刀轨调整方法

doi:10.7527/S1000-6893.2015.0017

Abstract

Abstract:

Deformation is easy to occur during the machining process for the large thin-walled aeronautical part, which has bad rigidity. In this case, on-machine inspection is needed. The inspection points are obtained and fed back to CAM system to fit surface and generate new tool path. The information needs to be transmitted between different departments and system platform during the above process, which reduces the productivity. In order to address the issues above, an adjusting method of tool path on machine for the manufacture of large thin-walled aeronautical part based on the integration of CAM and CNC is proposed in this paper. The frame of the integration of CAM and CNC is built and the dynamic feature information model is also built in this method to transmit information between CAM and CNC system. The theoretical interim state of part feature is generated based on the CAM system offline. The deformation of the feature interim state is confirmed based on the mapping relationship between theoretical interim state and the actual interim state, and the comparison for the theoretical and actual thickness in the CNC system. The tool path is adjusted on-machine for the situation that the final machining status conforming to the requirement of the tolerance cannot be enveloped by the machining allowance of the feature interim state. The system based on the adjusting method of tool path on machine for the manufacture of large thin-walled aeronautical part based on the integration of CAM and CNC is verified in an aviation manufacturing corporation. Using the proposed method, the transmission of information is reduced, the intensity of labor for technologist is decreased and the productivity is increased.

Key words: CAM, CNC, dynamic feature, thin-walled part, tool path adjustment on machine

CLC Number:

GAO Xin, LI Yingguang, LIU Changqing, ZHANG Chen. An adjusting method of tool path on machine for NC manufacture of large thin-walled aeronautical part based on integration of CAM and CNC[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(12): 3980-3990.

References

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An adjusting method of tool path on machine for NC manufacture of large thin-walled aeronautical part based on integration of CAM and CNC

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